Title: Effects of TiO₂ and Ag nanoparticles on microstructure and microhardness of AZ91D hybrid composite by FSP

Authors: Ram Niwas; Vikas Kumar

Addresses: Department of Mechanical Engineering, National Institute of Technology Kurukshetra, Haryana, 136119, India ' Department of Mechanical Engineering, National Institute of Technology Kurukshetra, Haryana, 136119, India

Abstract: In the present study, hybrid magnesium-based surface composites were created via FSP, and the impact of tool speeds, plunger depth, number of passes, and tilt angles on the microstructure and hardness were examined. TiO₂ nanoparticles and Ag nanoparticles were packed in grooves in equal ratios. Microhardness test, optical scanning, and FESEM were used to assess the composite surfaces. The findings showed that grain size increased with increasing rotational speed and the number of passes but decreased with increasing travel speed. It was also revealed that the distribution of the nanoparticles and hardness are directly related. The maximum microhardness stir zone (SZ) of hybrid composites was 120 Hv, significantly higher than base metal (63 Hv).

Keywords: friction stir processing; FSP; magnesium alloy; microstructure modification; hardness.

DOI: 10.1504/IJMATEI.2024.144231

International Journal of Materials Engineering Innovation, 2024 Vol.15 No.4, pp.288 - 302

Received: 16 Nov 2022
Accepted: 26 Jan 2023
Published online: 03 Feb 2025 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article